Question

Discuss the numbering of topographical maps of India. Illustrate your answer with the help of diagrams.

Answer 1

The numbering system of topographical maps in India, managed by the Survey of India, follows a grid-based framework using the International Map of the World (IMW) system. The country is divided into 4° x 4° quadrangles (e.g., 55D), each subdivided into 16 numbered 1° x 1° sheets. These sheets are further split into 16 smaller 15' x 15' sheets for detailed mapping. This systematic approach ensures uniformity, easy referencing, and efficient map usage across various scales and applications.